Implement slog.LogValuer

[nozo-moto]

#107

This change is 

code

package main
import (
"context""log/slog""os""github.com/cockroachdb/errors"
)
funcf1() error {
returnerrors.Wrap(f2(), "wrapped error 1")
}
funcf2() error {
returnerrors.Wrap(f3(), "wrapped error 2")
}
funcf3() error {
returnerrors.Wrap(f4(), "wrapped error 3")
}
funcf4() error {
returnerrors.Wrap(f5(), "wrapped error 4")
}
funcf5() error {
returnerrors.New("error root")
}
funcmain() {
ctx:=context.Background()
err:=f1()
logger:=slog.New(slog.NewJSONHandler(os.Stdout, nil))
logger.InfoContext(ctx, "test", slog.Any("error", err))
}

result

{
"time": "2023-09-18T17:57:09.438517+09:00",
"level": "INFO",
"msg": "test",
"error": {
"message": "wrapped error 1: wrapped error 2: wrapped error 3: wrapped error 4: error root",
"stacktrace": {
"main.f1": {
"file": "/Users/nozo/tmp/cockloaddb-slog-try/main.go",
"name": "main.f1",
"line": 12
},
"main.main": {
"file": "/Users/nozo/tmp/cockloaddb-slog-try/main.go",
"name": "main.main",
"line": 33
},
"runtime.main": {
"file": "/opt/homebrew/Cellar/go/1.21.1/libexec/src/runtime/proc.go",
"name": "runtime.main",
"line": 267
},
"runtime.goexit": {
"file": "/opt/homebrew/Cellar/go/1.21.1/libexec/src/runtime/asm_arm64.s",
"name": "runtime.goexit",
"line": 1197
}
}
}
}

[cockroach-teamcity]

All committers have signed the CLA.